static void
photos_selection_toolbar_favorite_clicked (GtkButton *button, gpointer user_data)
{
  PhotosSelectionToolbar *self = PHOTOS_SELECTION_TOOLBAR (user_data);
  PhotosSelectionToolbarPrivate *priv = self->priv;
  GList *selection;
  GList *l;

  if (priv->inside_refresh)
    return;

  selection = photos_selection_controller_get_selection (priv->sel_cntrlr);
  for (l = selection; l != NULL; l = l->next)
    {
      const gchar *urn = (gchar *) l->data;
      PhotosBaseItem *item;
      gboolean favorite;

      item = PHOTOS_BASE_ITEM (photos_base_manager_get_object_by_id (priv->item_mngr, urn));
      favorite = photos_base_item_is_favorite (item);
      photos_base_item_set_favorite (item, !favorite);
    }

  photos_selection_controller_set_selection_mode (priv->sel_cntrlr, FALSE);
}
static void
photos_preview_nav_buttons_favorite_clicked (PhotosPreviewNavButtons *self)
{
  PhotosPreviewNavButtonsPrivate *priv = self->priv;
  PhotosBaseItem *item;
  gboolean favorite;

  item = PHOTOS_BASE_ITEM (photos_base_manager_get_active_object (priv->item_mngr));
  favorite = photos_base_item_is_favorite (item);
  photos_base_item_set_favorite (item, !favorite);

  photos_preview_nav_buttons_update_favorite (self, !favorite);
}
static void
photos_selection_toolbar_favorite_clicked (GtkButton *button, gpointer user_data)
{
  PhotosSelectionToolbar *self = PHOTOS_SELECTION_TOOLBAR (user_data);
  GList *items = NULL;
  GList *selection;
  GList *l;

  if (self->inside_refresh)
    return;

  selection = photos_selection_controller_get_selection (self->sel_cntrlr);
  for (l = selection; l != NULL; l = l->next)
    {
      const gchar *urn = (gchar *) l->data;
      PhotosBaseItem *item;

      item = PHOTOS_BASE_ITEM (photos_base_manager_get_object_by_id (self->item_mngr, urn));
      items = g_list_prepend (items, g_object_ref (item));
    }

  /* photos_base_item_set_favorite will emit info-updated signal while
   * looping: there is a chance that the selection will get modified
   * while we are iterating over it. To avoid this we make a copy of
   * the selection and work on it.
   */
  for (l = items; l != NULL; l = l->next)
    {
      PhotosBaseItem *item = PHOTOS_BASE_ITEM (l->data);
      gboolean favorite;

      favorite = photos_base_item_is_favorite (item);
      photos_base_item_set_favorite (item, !favorite);
    }

  photos_selection_controller_set_selection_mode (self->sel_cntrlr, FALSE);
  g_list_free_full (items, g_object_unref);
}